
My watch is linked to the atomic CLOCK
in Boulder, Colorado.
The Big Bang Theory Season 1, Episode 10

I power a CLOCK with a potato.
The Big Bang Theory Season 6, Episode 22

What do you mean,
running out the CLOCK?
Breaking Bad Season 5, Episode 10

But if you don't mind me asking, uh,
the potato CLOCK, how does it work?
The Big Bang Theory Season 6, Episode 22